Rash On Legs More Condition_symptoms Why Do I Have Something On My Arms Like A Rash?

Why do I have something on my arms like a rash? - rash on legs more condition_symptoms

My arms are red and every time I put lotion on him, he begins to burn. And sometimes, it itches, but most of the time. Does anyone know why this happens? It is not as red as many points around the arm. Can someone help me and tell me why this happens and what can I do?